Magneto-optical effect in GaAs/GaAlAs semi-parabolic quantum well

Nguyen D. Hien, C.A. Duque, E. Feddi, Nguyen V. Hieu, Hoang D. Trien, Le T.T. Phuong, Bui D.Hoi, Le T. Hoa, Chuong V. Nguyen, Nguyen N. Hieu, Huynh V. Phuc



We theoretically study the combined effect of Al-concentration, hydrostaticpressure, and temperature on the magneto-optical absorption properties of a semi-parabolic quantum well (SPQW) by investigating the magneto-optical absorption coefficient (MOAC) and the full-width at half-maximum (FWHM). The expression of MOAC is expressed by the second-order golden rule approximation where the electron–longitudinal-optical (LO) phonon interaction is taken into account while the FWHM is obtained from the profile of the curves. The numerical calculations are made for a typical GaAs/GaAlAs quantum well. Our results showed that the Al-concentration, hydrostatic pressure, and temperature affect the magneto-optical absorption properties strongly. Threshold energy and the resonant peaks are non-monotonic functions of the Al-concentration. Moreover, it has been revealed that the magneto-optical absorption properties of SPQW can be controlled by changing these parameters.

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